package com.gaolang.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.util.HashMap;

@Configuration
public class DruidConfig {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }


    //后台监控：web.xml   ServletRegistrationBean
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean<StatViewServlet> bean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");

        //后台需要有人登录，账号密码配置
        HashMap<String, String> initParameters = new HashMap<>();

        //增加配置
        initParameters.put("loginUsername","admin");//key固定
        initParameters.put("loginPassword","123456");

        //允许谁可以访问
        initParameters.put("allow","");//第二个参数表示可以允许的用户，不填表示都可以访问
        //禁止谁能访问   initParameters.put("","","");参数表示禁止的用户

        //设置初始化参数
        bean.setInitParameters(initParameters);
        return bean;
    }

    //过滤器
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        //可以过滤哪些请求
        HashMap<String, String> initParameters = new HashMap<>();

        //这些东西不进行统计
        initParameters.put("exclusions","*.js,*.css,/druid/*");

        bean.setInitParameters(initParameters);
        return bean;
    }
}
